X(1870) and η_2(1870): Which Can Be Assigned as a Hybrid State?

摘要

The mass spectrum and strong decays of the X(1870) and η_2(1870) are analyzed. Our results indicate that X(1870) and η_2(1870) are the two different resonances.The narrower X(1870) seems likely a good hybrid candidate.We support the η_2(1870) as the η_2(2~1D_2) quarkonium. We suggest to search the isospin partner of (1870) in the channels of j/ψ→ρf_0(980)π and J/ψ → ρb_1(1235)π in the future. The latter channel is very important for testing the hybrid scenario.